Arch brick



1925' G. c. DENNEY ARCH BRICK Filed June 21, 1921 2 Sheets-Sheet 1 DQC. 8,

G. C. DENNEY ARCH BRICK Filed June 21, 1921 2 Sheets-Sheet 2 presenttknownttoine.

type of brick ltO' various'spansm r Flg. 5 is aplandviewz ofinne of fFi'gsiI 110 4:5' "'I 2 r. 1

-r-'Fig. 6 is an end elevation of such a brick.

Patented Dec. 8, 1925.

GUY CARLETQN em-an Q17 Insists Mammy TQ'AMEFICAN, ABQH, ""Co emanesaaeemwr QF E WA i ARCH 1531011.

Application filed June a1, 1921f" Serial 110,479,237.

To all whom 2'2, may concern: 7

Be it known that'I, GU CARLETON D NEY, a citizen of the United States," residing at Hinsdale, in the county. of Du Page and State-cf Illinois, have invented certainenew and useful :Impronements in: Arch. Bricks, of which the following is. a specification. Q My: invention relates toiarchvbricks, and especiallyr'bricks for; fire, arohesasuchias are used in locomotive fire boxes, fornexarnple. My obj ect'is'zitoadapti one. and the sa nebrick to widely varying spanshetween circulation tube's'o'r othermernhers supporting the arch,

so'that thereshall'be no. need ofrr keepingion hand bricks-: of f1nanydifferent lengths; I

also aimfto make theiarches builtriofvsuch selffadj usting bricks substantially uniform in strengthjfor. all. spans Within their. range of self-adjustment; and to: obviate or minimize the tendency .'foi'-; -coope rat111g br cks that have fused together illiSQBViCfii tov break apart in the V rough ha'ndling. which they undergoivhen a". locomotive arclrzis taken down; and. replaced again for any; reason; llow these and other advantages-Joan be obtained through my inventionzwill. appear from description hereinafter:of the hest forms of 'einbodiment- "ofwth'e intrentionqat the draWings,' Fig. 1 afraginentary cliagra nmatic IVieW= showing 1' a transverse section through locomotive .fire; ihox'alwrth rain arch therein constructed according to my iIIVGHtI OIL 1.1'. ""I'ET. Ii- '1 "=j: Figsr2, 3, and 4 are-enlarged fragmentary views illilstrating :the 'adaptahility. ofifiny the black shown inithe' arch illustrated'iin members Fig;- 7 is a side elevationof a modified form of'brick,-=and Fags. 8. and '9 are aloofresponding plan and: a'co rrespondingyzend elevation, respectively. 1

.=.Fig:10-:showsiacross-section of. such a brick; taken asindic'a-ted "by? the line:1Q:-, 10

iniFig.l7. f

The fire arch 20 shown l coniprises a plurality :of 'main; spans supported hy; circul'ation tubes 22 extending lengthwise of the 1 locfor notiveifire box 23," well as lateral thalispan's? 24 supported between ':the "outermost {tubes 22 and the 'sidefsheets .25 0f the ffire :Lb JLZEach ofth main? pa11s;'.('o11.individ-i i in. Ee -2 o normal. p n i Eiga units: GVe tQ ding leng hw s o th fi e (BOX-23511511161. een end-.0 T go a h. the arch units 26 (see Figs. 2 and4) m-p ises ap ir of e ectQry/fire bxick ual nain arches) comprises aseries of arch .0; res ing olithe tubes. ZZwasSuPP-OI-m'and i1 aning agai stm e another mam-middle- -F0 conve e, shall her i a t r. eg rd the porti n -ref he fire: bricks. 3 which t .1 th Supp rts 2.2 agai st o e anot er tienolf; Without reference to the p nopor- .1

le erminine i gt On one of these portions (as shownpth e per-:1

$1011.36); the brick has a; convexface 40, and v t e oth rrosi (a i hewnt h Porti l a h l ow. nee iT elat r ar an '.ment 'of itheacontzex and hollow end faces .40; and 41 1 zis su c-hthatinithe arch unit they correlatiaely correspond and, make inultiple v llneicQnta Ll. 6;, the ,corwexfe e 40 o fline brick 30 b a asain tthe h ller-r er e 4 o t e i ope at gzbr ck 39 ele e "mo e han a Single ne.. l .-I conta t; a d v ce: tense. J "Th is so in various reciprocally leaning angular at q s of the; Qp re n btlfi 9 W o s spens r. n 'u rmal -:.(Sh .?t) spa s?- as on ui ef malllong) span n e n Fig; 4- vAslshown, the {hollow end face 41 is] concarely, curred and,v the end face 40 convexly curved, so. that when the fire; arch is in service he up rfi l! us of th bric v 1 .iassure their sticking ogether; over a iconsiderable Width and} area, More than this the fqlitdii andcurvatures ofthefaces: 40 and 41 are the same; and concentric, seas-to giye real s ace a n ct s d ting 1ishe firm'n mer line Con t es :ce rie wt ve y'," acet v spending;colnple nentarily curved bearing ,.surfaces in the; ,r'zarious angular: relations of I th a pe eti-ngabn ls 01 var ous. pans, i I

i'acldi oh he: ente 'srf of curvatu ,aqfhe bearing surfaces 40 and 41 are so located that the surface 40 faces downward and the surface 41 upward, so as to assure .the most stable mutual support of the reciprocally leaning brick on various spans. Under the varying angular relations of the brick corresponding to the veryconsiderable range of span to which the bricks are intended to adjust and. accommodate themselves, the strength of the arch is substantially uniform, and the surface character of the contact between the brick is unaffected by the variation in angle. I

As shown, the respective upper and lower corners A2 and 43 of the faces 40 and 41 are appropriately bevelled, reduced, or blunted, to minimize breakage and fusion at these exceptionally exposed points. Also, the upper surfaces of the nose portions 36 are inclined downward a little relatively to the general upper surfaces of the bricks, so as to make them flush with one another on normal spans and to minimize their upward protuberance on subnormal spans. As a whole,'the interengaging ends of the bricks are exact counterparts of one another.

The brick shown in Figs. 7 to 10 differs from that shown in Figs. 2 to 6 in having its main body portion51 lightened somewhat by recesses 52 in its lower side. Also, the hollowed support engaging edge 53 is slightly recessed at 54 in its middle, to assure a stable two point bearing on the support and obviate rocking and chattering in service.

Each pair of brick members will fuse together probably during the course of the first run made by the locomotive and form, as it were, a single brick which can be removed and replaced as a unit. The construction constitutes what may be termed a threehinged arch in which the pivot point of the center hinge moves upwardly or downwardly as the outer hinges or pivots moveinward- 1y or outwardly in different spans.

I claim: i

l.- An arch brick having on one end a convex face and a hollow face adapted to make multiple line contact, respectively, with correlatively corresponding hollow and. convex faces on one end of another brick in various reciprocally leaning angular relations of such bricks on various spans.

. 2. An arch brick having on one end concentric concave and convex faces adapted to make contact, respectively, with correlatively corresponding concentric convex and concave faces on one end of another brick in various reciprocally leaning angular relations of such bricks on various spans.

3. An arch brick having on one end oppositely curved bearing surfaces, one facingupward and the other downward, adapted to make contact wlth correlatlvely corresponding complementarily curved downward and upward facing bearing surfaces on one end of another brick in various reciprocally leaning angular relations of such bricks, so as to assure the'most stable mutual support of such bricks on various spans.

4:. An arch brick having on one end concentric concave and convex faces of the same curvature adapted to make surface contact with correlatively corresponding counterpart faces on another brick in various reciprocally leaning angular relations of such bricks.

5. An arch brick having on one end concentric concave and convex faces of the same curvature, the former facing upward and the latter downward, adapted to make surface contact with correlatively correspond ing faces on another brick in various reciprocally leaning angular relations of such bricks, so as to assure the most stable mutual support of such bricks on various spans.

6. An arch brick having at one end correlative recess and projecting nose portions with end faces concentrically curved to the same radius and adapted to make surface contact with corresponding complementarily curved faces of the counterpart end -of another brick in various reciprocally leaning angular relationsof the bricks.

7. A brick member for sectional fire box arch constructions in which the members are arranged in pairs with one member engaging the other at their inner ends and with their outer ends supported on the adjacent structure, having on its member engaging end oppositely disposed rounded bearing surfaces of similar curvature which form between the members of a pair a hinge joint of substantially ball and socket character permitting flexure of the members to, make them accommo'dable to substantial variations in the distance between the supporting structures for the outer ends, said rounded surfaces in a pair of members riding on each other with a full bearing during flexure.

8. A brick member for sectional fire box arch constructions in which the members are arranged in pairs with one member engaging the other at their inner ends and with their outer ends supported on the adjacent structure, having on its member engaging end a portion cut away for a distance which is approximately half the width ofthe member, such formation creating a recess and a projecting nose of substantially equal width, the recess having a rounded bearing surface facing upwardly and the nose. having a rounded bearingsurface of similar but opposite curvature facing downwardly.

9. An arch construction for fire boxes comprising a pair. of brick members adapted each having a rounded bearing surface opening up\\*ar'dly and a similarly curved rounded bearing surface opening clown- Wardly, each of said surfaces extending substantially across the depth of the member.

10. An arch construction for fire boxes comprising a pair of brick members adapted to be supported at their outer ends upon the adjacent structure and to lean against each other at their inner en'ds,-said inner ends being substantially counterpart in form and each having a rounded bearing surface opening upwardly and a similarly curved rounded bearing surface opening downwardly, said surfaces being so disposed as to constitute, in a pair, a hinge joint permitting flexure of the members to accommodate variations in the span to which they are applied and to provide a surface contact as distinguished from a line contact throughout the range of flexure.

In testimony whereof, I have hereunto signe'dvmy name.

' GUY OARLETON DENNEY. 

